0818单文件上传, 多文件上传，上传与错误处理

单文件上传

if(isset($_FILES['my_pic'])){
    $name =  $_FILES['my_pic']['name'];
    $tmpName =   $_FILES['my_pic']['tmp_name'];
    $error =  $_FILES ['my_pic']['error'];
    if($error > 0){
        $tips = '<span style="color:red;">上传失败</span><br>';
        switch($error){
            case 1:
                $tips .= '大小超过了php.ini中的允许上传的文件大小';
                break;
            case 2:
                $tips .= '大小超过了表单中(MAX_FILE_SIZE)的允许上传的文件大小';
                break;
            case 3:
                $tips .= '文件只有部分被上传';
                break;
            case 4:
                $tips .= '没有文件被上传';
                break;
            case 6:
                $tips .= '找不到临时目录';
                break;
            case 7:
                $tips .= '文件写入失败。请检查目录权限';
                break;
        }
        echo "<p>$tips</p>";
    }else{
        if(is_uploaded_file($tmpName)){
            $allow = ['jpg', 'jpeg', 'png', 'gif', 'webp'];
            $ext = pathinfo($name)['extension'];
            if (in_array($ext,$allow)){
                $path = 'uploads/';
                $dest = $path . md5($name) . '.' . $ext;
                if(move_uploaded_file($tmpName, $dest)){
                    echo '<p>上传成功</p>';
                    //预岚
                    echo "<img src='$dest' width='300'>";
                }else{
                }
            }else{
                echo '<p>文件类型错误</p>';
            }
        }else{
            echo '<p>上传方式非法</p>';
        }
    }
}

错误提示

    if($error > 0){
        $tips = '<span style="color:red;">上传失败</span><br>';
        switch($error){
            case 1:
                $tips .= '大小超过了php.ini中的允许上传的文件大小';
                break;
            case 2:
                $tips .= '大小超过了表单中(MAX_FILE_SIZE)的允许上传的文件大小';
                break;
            case 3:
                $tips .= '文件只有部分被上传';
                break;
            case 4:
                $tips .= '没有文件被上传';
                break;
            case 6:
                $tips .= '找不到临时目录';
                break;
            case 7:
                $tips .= '文件写入失败。请检查目录权限';
                break;
        }
        echo "<p>$tips</p>";
    }

文件上传

 <form action="" method="POST" enctype="multipart/form-data">
        <fieldset>
            <legend>单文件上传</legend>
            <input type="file" name="my_pic">
            <button>上传</button>
        </fieldset>
    </form>

多文件 批量上传

if(isset($_FILES['my_pic'])){
    foreach ($_FILES['my_pic']['error'] as $key=>$error){
        if($error === UPLOAD_ERR_OK){
            $temName = $_FILES['my_pic']['tmp_name'][$key];
            $name = $_FILES['my_pic']['name'][$key];
            $dest = 'uploads/' . $name
            move_uploaded_file($temName, $dest);
             //预岚
            echo "<img src='$dest' width='300'>";
        }
    }
}